Alert archive / Pennsylvania / Flash Flood Warnings in 2016

Flash Flood Warning 8, NWS State College, PA

August 10, 2016Huntingdon County, Juniata County, Mifflin County, Pennsylvania

NWS State College, PA issued this flash flood warning at Aug 10, 2016, 7:02 PM EDT for Huntingdon County, Juniata County, Mifflin County, Pennsylvania. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 10, 2016, 7:02 PM EDT (23:02 UTC)
Expired: Aug 10, 2016, 10:00 PM EDT
In force: 3 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: None

Counties Huntingdon County, PA, Juniata County, PA, Mifflin County, PA

The radar

The State College radar (KCCX), 62 km from the middle of the area, began a volume at 23:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 10, 7:13 PM EDT	FLASH FLOOD	Newton Hamilton, PA	RT 103 CLOSED

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.0 hours before the alert went out and 163 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 221 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 687 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

624 
WGUS51 KCTP 102302
FFWCTP
PAC061-067-087-110200-
/O.NEW.KCTP.FF.W.0008.160810T2302Z-160811T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
702 PM EDT WED AUG 10 2016

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN JUNIATA COUNTY IN CENTRAL PENNSYLVANIA...
  SOUTHWESTERN MIFFLIN COUNTY IN CENTRAL PENNSYLVANIA...
  EAST CENTRAL HUNTINGDON COUNTY IN CENTRAL PENNSYLVANIA...

* UNTIL 1000 PM EDT.

* AT 659 PM EDT...DOPPLER RADAR CONTINUES TO SHOW SLOW MOVING
  THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. OVER
  THREE INCHES OF RAIN HAVE ALREADY FALLEN WITH ANOTHER INCH OR SO 
  POSSIBLE. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MOUNT UNION...KISTLER...NEWTON HAMILTON AND MAPLETON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4042 7767 4034 7767 4034 7794 4042 7794

$$

KF

1 follow-up statement

212 
WGUS71 KCTP 110102
FFSCTP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
902 PM EDT WED AUG 10 2016

PAC067-110107-
/O.CAN.KCTP.FF.W.0008.000000T0000Z-160811T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JUNIATA PA-
902 PM EDT WED AUG 10 2016

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN JUNIATA COUNTY IS
CANCELLED...

FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO
HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4034 7794 4042 7794 4042 7771 4038 7775
      4035 7774 4034 7774

$$

PAC061-087-110200-
/O.CON.KCTP.FF.W.0008.000000T0000Z-160811T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MIFFLIN PA-HUNTINGDON PA-
902 PM EDT WED AUG 10 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR
SOUTHWESTERN MIFFLIN AND EAST CENTRAL HUNTINGDON COUNTIES...

ADDITIONAL SHOWERS AND POSSIBLE THUNDERSTORMS WILL AFFECT THE AREA
BETWEEN 9 AND 10 PM. HOWEVER, THE HEAVIEST RAIN HAS ALREADY
FALLEN. OVER 4 INCHES OF RAIN HAS BEEN REPORTED, CAUSING ROUTE 103
TO BE CLOSED IN NEWTON HAMILTON.   

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MOUNT UNION...KISTLER...NEWTON HAMILTON AND MAPLETON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4034 7794 4042 7794 4042 7771 4038 7775
      4035 7774 4034 7774

$$

KF

The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 10, 3:35 AM EDT	Areal Flood Advisory	CTP	Warren	4 hr
Aug 10, 5:28 AM EDT	Flash Flood Warning	CTP	Warren	3 hr
Aug 10, 6:14 AM EDT	Areal Flood Advisory	CTP	Cameron, Elk, McKean, Potter, Warren	3 hr
Aug 10, 6:17 AM EDT	Special Weather Statement	CTP	Elk	43 min
Aug 10, 4:30 PM EDT	Special Weather Statement	CTP	Mifflin	30 min
Aug 10, 4:50 PM EDT	Special Weather Statement	CTP	Snyder	25 min
Aug 10, 4:54 PM EDT	Special Weather Statement	CTP	Blair	36 min
Aug 10, 5:39 PM EDT	Special Weather Statement	CTP	Elk	36 min
Aug 10, 5:54 PM EDT	Special Weather Statement	CTP	Huntingdon	36 min
Aug 10, 6:15 PM EDT	Special Weather Statement	CTP	Cameron	45 min
Aug 10, 6:23 PM EDT	Areal Flood Advisory	CTP	Huntingdon, Juniata, Mifflin	52 min
Aug 10, 6:27 PM EDT	Special Weather Statement	CTP	Lycoming	33 min
Aug 10, 6:49 PM EDT	Special Weather Statement	CTP	Clearfield	26 min
Aug 10, 7:06 PM EDT	Special Weather Statement	CTP	Huntingdon	24 min
Aug 10, 7:13 PM EDT	Special Weather Statement	CTP	Columbia	47 min
Aug 10, 7:29 PM EDT	Special Weather Statement	CTP	Cumberland	46 min
Aug 10, 7:58 PM EDT	Special Weather Statement	CTP	Centre	32 min

Nearby

Flash Flood Warnings in Pennsylvania, 2016 Every flash flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.